Refcount grpc_alarm object so that grpc_alarm_destroy can safely be called before the alarm event is dequeued from the completion queue
diff --git a/grpc.gemspec b/grpc.gemspec
index 18ef37a..ff01882 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -256,6 +256,7 @@
s.files += %w( src/core/lib/slice/slice_hash_table.h )
s.files += %w( src/core/lib/slice/slice_internal.h )
s.files += %w( src/core/lib/slice/slice_string_helpers.h )
+ s.files += %w( src/core/lib/surface/alarm_internal.h )
s.files += %w( src/core/lib/surface/api_trace.h )
s.files += %w( src/core/lib/surface/call.h )
s.files += %w( src/core/lib/surface/call_test_only.h )